Category: Processing and quality
Resampling
Resampling changes the pixel grid of a raster, for example when reprojecting or changing resolution.
Also known as: interpolation (raster), grid resampling
Expanded definition
Resampling happens when you change a raster’s grid, such as converting a 20 m band to a 10 m grid or reprojecting into a different CRS.
Resampling does not create new information. It changes how values are interpolated and can affect edges, small features, and statistics.
Common methods include nearest neighbor (best for labels), bilinear, and cubic interpolation (common for continuous values). The method should match the data type and the use case.
Related terms
Raster
A raster is a grid of pixels where each pixel stores a value, commonly used for satellite imagery and elevation models.
Spatial Resolution
Spatial resolution describes the ground detail an image can represent, commonly expressed as meters per pixel.
Reprojection
Reprojection converts data from one coordinate reference system (CRS) to another.
Pixel
A pixel is the smallest unit in a raster; it represents the sensor’s measurement over a ground area.